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https://github.com/rwinkhart/sys.git
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Chongyi Zheng
6239615695
This CL gets ID_AA64MMFR1_EL1, Memory Model Feature Register 1, and grabs HPDS, LOR, PAN features from its bits. Fixes golang/go#75472. Change-Id: Ic04b109d79aceba9b3b1d3a1ea514fcf132007c5 GitHub-Last-Rev: f938ff468bca49cc7863aa26e7a880eec2823bb4 GitHub-Pull-Request: golang/sys#263 Reviewed-on: https://go-review.googlesource.com/c/sys/+/704075 Reviewed-by: Keith Randall <khr@google.com> Auto-Submit: Keith Randall <khr@golang.org> Reviewed-by: Michael Knyszek <mknyszek@google.com> LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Keith Randall <khr@golang.org>
48 lines
1.1 KiB
ArmAsm
48 lines
1.1 KiB
ArmAsm
// Copyright 2019 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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//go:build gc
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#include "textflag.h"
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// func getisar0() uint64
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TEXT ·getisar0(SB),NOSPLIT,$0-8
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// get Instruction Set Attributes 0 into x0
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// mrs x0, ID_AA64ISAR0_EL1 = d5380600
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WORD $0xd5380600
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MOVD R0, ret+0(FP)
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RET
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// func getisar1() uint64
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TEXT ·getisar1(SB),NOSPLIT,$0-8
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// get Instruction Set Attributes 1 into x0
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// mrs x0, ID_AA64ISAR1_EL1 = d5380620
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WORD $0xd5380620
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MOVD R0, ret+0(FP)
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RET
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// func getmmfr1() uint64
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TEXT ·getmmfr1(SB),NOSPLIT,$0-8
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// get Memory Model Feature Register 1 into x0
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// mrs x0, ID_AA64MMFR1_EL1 = d5380720
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WORD $0xd5380720
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MOVD R0, ret+0(FP)
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RET
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// func getpfr0() uint64
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TEXT ·getpfr0(SB),NOSPLIT,$0-8
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// get Processor Feature Register 0 into x0
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// mrs x0, ID_AA64PFR0_EL1 = d5380400
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WORD $0xd5380400
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MOVD R0, ret+0(FP)
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RET
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// func getzfr0() uint64
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TEXT ·getzfr0(SB),NOSPLIT,$0-8
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// get SVE Feature Register 0 into x0
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// mrs x0, ID_AA64ZFR0_EL1 = d5380480
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WORD $0xd5380480
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MOVD R0, ret+0(FP)
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RET
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